最近在贴吧上看到有个提问就是关于怎么在Winform上实时的更新数据
提问者提到的是利用Timer去轮询,但最后经过网上查了下资料,感觉Socket也是可行的,
于是就写了这个Demo
这个Demo的思路很简单:
有一个Socket服务端,只负责接收多个客户端传过来的讯息,根据讯息内容去判断是否广播
这里每一个winform窗体程序就是一个Socket客户端,如果窗体上对数据库做了更新(例如增,删,改)操作
就会调用一个方法,该方法主要是向Socket服务端发送一个字符串"1"
当Socket服务端接收到了字符串为"1"时,则广播给所有客户端一个字符串"1"
而当客户端接收到服务端传过来一个"1"时,则立即执行数据绑定的方法(重新将界面的DataGridVeiw数据绑定)
这样就实现了一有数据改变就实时刷新的效果
下面贴出各部分代码
================服务端====================================================
服务端的界面,比较简单
public partial class Server : Form { public Server() { InitializeComponent(); } /// <summary> /// 已连接上的客户端集合 /// </summary> List<Socket> clinetSockets; /// <summary> /// 服务端主Socket /// </summary> Socket socket; /// <summary> /// 设置数据缓冲区 /// </summary> private byte[] result = new byte[1024]; /// <summary> /// 开启侦听按钮点击事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void button1_Click(object sender, EventArgs e) { //初始化 clinetSockets = new List<Socket>(); //创建socket对象 socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); //获取ip地址和端口(其实应该把它放在配置文件中,客户端的ip和port都放在配置文件中) IPAddress ip = IPAddress.Parse(txtIPAddress.Text.Trim()); int port = Convert.ToInt32(txtPort.Text.Trim()); IPEndPoint point = new IPEndPoint(ip, port); //绑定ip和端口 socket.Bind(point); //设置最大连接数 socket.Listen(10); listBox1.Items.Add("服务器已开启,等待客户端连接中....."); //开启新线程监听 Thread serverThread = new Thread(ListenClientConnect); serverThread.IsBackground = true; serverThread.Start(socket); } /// <summary> /// 监听传入 /// </summary> /// <param name="ar"></param> private void ListenClientConnect(object ar) { //设置标志 bool flag = true; //获得服务器的Socket Socket serverSocket = ar as Socket; //轮询 while (flag) { //获得连入的客户端socket Socket clientSocket = serverSocket.Accept(); //将新加入的客户端加入列表中 clinetSockets.Add(clientSocket); //向listbox中写入消息 listBox1.Invoke(new Action(() => { listBox1.Items.Add(string.Format("客户端{0}已成功连接到服务器 ", clientSocket.RemoteEndPoint)); })); //开启新的线程,进行监听客户端消息 var mReveiveThread = new Thread(ReceiveClient); mReveiveThread.IsBackground = true; mReveiveThread.Start(clientSocket); } } /// <summary> /// 接收客户端传过来的数据 /// </summary> /// <param name="obj"></param> private void ReceiveClient(object obj) { //获取当前客户端 //因为每次发送消息的可能并不是同一个客户端,所以需要使用var来实例化一个新的对象 //可是我感觉这里用局部变量更好一点 var mClientSocket = (Socket)obj; // 循环标志位 bool flag = true; while (flag) { try { //获取数据长度 int receiveLength = mClientSocket.Receive(result); //获取客户端消息 string clientMessage = Encoding.UTF8.GetString(result, 0, receiveLength); //服务端负责将客户端的消息分发给各个客户端 //判断客户端发来的消息是否是预定的标志 if (clientMessage=="1") { //通知各客户端 this.SendMessage("1"); } //向listbox中写入消息 listBox1.Invoke(new Action(() => { listBox1.Items.Add(string.Format("客户端{0}发来消息{1}", mClientSocket.RemoteEndPoint, clientMessage)); })); } catch(Exception e) { //从客户端列表中移除该客户端 clinetSockets.Remove(mClientSocket); //显示客户端下线消息 listBox1.Invoke(new Action(() => { listBox1.Items.Add(string.Format("服务器发来消息:客户端{0}从服务器断开,断开原因:{1} ", mClientSocket.RemoteEndPoint, e.Message)); })); //断开连接 mClientSocket.Shutdown(SocketShutdown.Both); mClientSocket.Close(); break; } } } /// <summary> /// 向所有的客户端群发消息 /// </summary> /// <param name="msg">message</param> public void SendMessage(string msg) { //确保消息非空以及客户端列表非空 if (msg == string.Empty || clinetSockets.Count <= 0) return; //向每一个客户端发送消息 foreach (Socket s in this.clinetSockets) { (s as Socket).Send(Encoding.UTF8.GetBytes(msg)); } } /// <summary> /// 窗体关闭后释放资源 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void Server_FormClosing(object sender, FormClosingEventArgs e) { } }
======================================客户端=================================
public partial class Clinet : Form { public Clinet() { InitializeComponent(); } //创建数据对象 Data get = new 客户端.Data(); /// <summary> /// 客户端的Socket /// </summary> Socket clinet; private void Clinet_Load(object sender, EventArgs e) { RefTable(); //创建socket CreateSocket(); } /// <summary> /// 创建客户端的Socket /// </summary> private void CreateSocket() { // 创建socket clinet = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); //连接 //获得ip和端口(读取配置文件) var app = System.Configuration.ConfigurationManager.AppSettings; IPEndPoint point = new IPEndPoint(IPAddress.Parse(app["ip"]), Convert.ToInt32(app["port"])); //连接服务器 clinet.Connect(point); //开启新线程获取服务器端消息 Thread thClinet = new Thread(new ThreadStart(CallRec)); thClinet.IsBackground = true; thClinet.Start(); } /// <summary> /// 接收消息 /// </summary> private void CallRec() { bool flag = true; while (flag) { byte[] recBuf = new byte[1024]; //获取返回数据的长度 int length = clinet.Receive(recBuf); //获取监听到的数据 string reslut = Encoding.UTF8.GetString(recBuf, 0, length); if (reslut == "1") { //刷新表格数据 RefTable(); } } } /// <summary> /// 刷新表格 /// </summary> private void RefTable() { dataGridView1.Invoke(new Action(() => { dataGridView1.DataSource = get.GetPersonList(); })); } /// <summary> /// 添加数据事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btnAdd_Click(object sender, EventArgs e) { //获取用户输入 string name = txtAddName.Text; int age = Convert.ToInt32(txtAgeAdd.Text); string phone = txtPhoneAdd.Text; //实例化一个数据对象 Person p = new Person() { Name = name, Age = age, Phone = phone }; //写入数据 AddList(p); } /// <summary> /// 写入数据 /// </summary> /// <param name="p"></param> private void AddList(Person p) { //获取数据集合 List<Person> list = dataGridView1.DataSource as List<Person>; //加入数据 list.Add(p); //加入数据 bool b = get.Add(list); if (b) { MessageBox.Show("增加成功"); //增加成功后发送socket信息 //向服务器发送消息 clinet.Send(Encoding.UTF8.GetBytes("1")); } else { MessageBox.Show("增加失败"); } } private void Clinet_FormClosing(object sender, FormClosingEventArgs e) { } }
客户端是读取的本地Json数据创建的对象集合用以模拟数据库
class Person { public string Name { get; set; } public int Age { get; set; } public string Phone { get; set; } }
class Data { System.Web.Script.Serialization.JavaScriptSerializer js = new System.Web.Script.Serialization.JavaScriptSerializer(); public List<Person> GetPersonList() { //读取json数据 string jsonStr = File.ReadAllText("Data.json"); List<Person> list = js.Deserialize<List<Person>>(jsonStr); return list; } public bool Add(List<Person> list) { //向数据中覆盖追加 string strJson = js.Serialize(list); try { File.WriteAllText("Data.json", strJson); return true; } catch { return false; } } }
Data.json数据
[ { "name": "张三", "age": 14, "phone": "13888888888" }, { "name": "张三", "age": 14, "phone": "13888888888" }, { "name": "张三", "age": 14, "phone": "13888888888" }, { "name": "张三", "age": 14, "phone": "13888888888" }, { "name": "张三", "age": 14, "phone": "13888888888" }, { "name": "张三", "age": 14, "phone": "13888888888" }, { "name": "张三", "age": 14, "phone": "13888888888" } ]
====================================运行效果图==============================
=========================================分割线==================================
其实个人觉得可以把服务端做成一个Windows服务更好
代码打包地址(内含windows服务代码)
关于如何将windows服务如何安装到服务中,网上教程很多,请自行百度
https://pan.baidu.com/s/1J6SIGxwzzvG-B1ACyDWPKw
个人拙作,敬请谅解.